package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.weaver.ast.Or;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.text.Format;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private WebSocketServer webSocketServer;

    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;

    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        //处理业务异常（地址为空，购物车为空）
        Long addressBookId = ordersSubmitDTO.getAddressBookId();
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        // 检查客户的配送地址是否满足要求
        checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());


        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        if (shoppingCartList == null && shoppingCartList.size() == 0) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //1、向订单表中插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);
        orderMapper.insert(orders);

        //2、向订单明细表中插入多条数据
        List<OrderDetail> orderDetailList = new ArrayList<>();

        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(orders.getId());
            orderDetailList.add(orderDetail);
        }
        orderDetailMapper.insertBatch(orderDetailList);

        //3、清空购物车
        shoppingCartMapper.deleteByUserId(userId);

        //4、返回VO结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orders.getId())
                .orderTime(orders.getOrderTime())
                .orderAmount(orders.getAmount())
                .orderNumber(orders.getNumber())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;
    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        // WebSocket向客户端推送消息
        Map map = new HashMap();
        map.put("type", 1);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号：" + outTradeNo);

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }


    /**
     * 用户查询历史订单
     *
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery4User(Integer pageNum, Integer pageSize, Integer status) {
        PageHelper.startPage(pageNum, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 分页查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList<>(); //返回OrderVO集合给前端展示

        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.size() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO orderDetail(Long id) {
        Orders orders = orderMapper.getById(id);

        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    /**
     * 取消订单
     *
     * @param id
     */
    @Override
    public void cancel(Long id) throws Exception {
        /**
         * - 待支付1和待接单2状态下，用户可直接取消订单
         * - 商家已接单3和派送中4状态下，用户取消订单需电话沟通商家
         * - 如果在待接单2状态下取消订单，需要给用户退款
         */

        // 1、获取订单状态
        Orders ordersDB = orderMapper.getById(id);
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        Integer status = ordersDB.getStatus();

        // 如果已支付并且已结单，不能直接退款
        if (status > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(id);

        if (ordersDB.getStatus() == Orders.TO_BE_CONFIRMED) {
            weChatPayUtil.refund(ordersDB.getNumber(), //商户订单号
                    ordersDB.getNumber(), //商户退款单号
                    new BigDecimal(0.01),//退款金额，单位 元
                    new BigDecimal(0.01));//原订单金额

            orders.setPayStatus(Orders.REFUND);
        }

        orders.setCancelReason("用户取消订单");
        orders.setCancelTime(LocalDateTime.now());
        orders.setStatus(Orders.CANCELLED);

        orderMapper.update(orders);
    }

    /**
     * 再来一单
     *
     * @param id
     */
    @Override
    public void repetitionOrder(Long id) {
        Orders orders = orderMapper.getById(id);
        Long userId = orders.getUserId();

        // 查询订单的订单明细，重新加入到对应用户的购物车中
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        List<ShoppingCart> shoppingCartList = new ArrayList<>();

        for (OrderDetail orderDetail : orderDetailList) {
            ShoppingCart shoppingCart = new ShoppingCart();
            BeanUtils.copyProperties(orderDetail, shoppingCart);
            shoppingCart.setUserId(userId);
            shoppingCartList.add(shoppingCart);
        }
        shoppingCartMapper.insertBatch(shoppingCartList);
    }


    /**
     * 订单搜索(分页查询)
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> orderVOList = new ArrayList<>();

        if (page != null && page.size() > 0) {
            for (Orders orders : page) {

                String orderDishesStr = getOrderDishesStr(orders);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDishes(orderDishesStr);

                orderVOList.add(orderVO);
            }
        }

        return new PageResult(page.getTotal(), orderVOList);
    }

    /**
     * 各个状态订单数量统计
     *
     * @return
     */
    @Override
    public OrderStatisticsVO statisticsOrders() {
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();

        Integer confirmedOrdersNum = 0;
        Integer ToBeConfirmedOrdersNum = 0;
        Integer DeliveryInProcessOrdersNum = 0;

        // 获取所有Orders
        List<Orders> ordersList = orderMapper.getAll();
        for (Orders orders : ordersList) {
            Integer status = orders.getStatus();
            if (status == Orders.CONFIRMED) {
                confirmedOrdersNum += 1;
            } else if (status == Orders.TO_BE_CONFIRMED) {
                ToBeConfirmedOrdersNum += 1;
            } else if (status == Orders.DELIVERY_IN_PROGRESS) {
                DeliveryInProcessOrdersNum += 1;
            }
        }

        orderStatisticsVO.setConfirmed(confirmedOrdersNum);
        orderStatisticsVO.setDeliveryInProgress(DeliveryInProcessOrdersNum);
        orderStatisticsVO.setToBeConfirmed(ToBeConfirmedOrdersNum);

        return orderStatisticsVO;
    }

    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        Orders orders = orderMapper.getById(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        orderVO.setOrderDetailList(orderDetailList);

        return orderVO;
    }

    /**
     * 接单
     *
     * @param ordersConfirmDTO
     */
    @Override
    public void confirmOrders(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        orderMapper.update(orders);
    }

    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    @Override
    public void rejectOrders(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        Orders orderDB = orderMapper.getById(ordersRejectionDTO.getId());
        // 订单不为空且订单状态为待确认才可以拒单
        if (orderDB == null || !(orderDB.getStatus() == Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // 若客户已经支付，需要退款
        Integer payStatus = orderDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            String refund = weChatPayUtil.refund(
                    orderDB.getNumber(),
                    orderDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01)
            );
            log.info("申请退款：{}", refund);
        }

        // 拒单需要退款，根据订单id更新订单状态、拒单原因、取消时间
        Orders orders = new Orders();
        orders.setId(orderDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);

    }

    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    @Override
    public void cancelOrders(OrdersCancelDTO ordersCancelDTO) throws Exception {
        // 可以取消的订单状态 - 已确认confirmed
        Orders orderDB = orderMapper.getById(ordersCancelDTO.getId());


        // 若客户已经支付，需要退款
        Integer payStatus = orderDB.getPayStatus();
        if (payStatus == Orders.PAID) {
            String refund = weChatPayUtil.refund(
                    orderDB.getNumber(),
                    orderDB.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01)
            );
            log.info("申请退款：{}", refund);
        }

        // 拒单需要退款，根据订单id更新订单状态、取消原因、取消时间
        Orders orders = new Orders();
        orders.setId(orderDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);

    }

    /**
     * 派送订单
     *
     * @param id
     */
    public void delivery(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为3
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }


    /**
     * 客户催单
     *
     * @param id
     */
    @Override
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        // WebSocket向客户端推送消息
        Map map = new HashMap();
        map.put("type", 2);
        map.put("orderId", ordersDB.getId());
        map.put("content", "订单号：" + ordersDB.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

    }

    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {

        Long id = orders.getId();
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        List<String> OrderDishesStringList = new ArrayList<>();

        //菜品信息：" 菜品名称*菜品数量; "
        for (OrderDetail orderDetail : orderDetailList) {
            String name = orderDetail.getName();
            Integer number = orderDetail.getNumber();

            String orderDishesStrTemp = name + "*" + number.toString() + ";";

            OrderDishesStringList.add(orderDishesStrTemp);
        }

        String orderDishesStr = String.join("", OrderDishesStringList);

        return orderDishesStr;
    }

    /**
     * 检查客户的收货地址是否超出配送范围
     *
     * @param address
     */
    private void checkOutOfRange(String address) {
        Map map = new HashMap();
        map.put("address", shopAddress);
        map.put("output", "json");
        map.put("ak", ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address", address);
        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        jsonObject = JSON.parseObject(userCoordinate);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");
        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin", shopLngLat);
        map.put("destination", userLngLat);
        map.put("steps_info", "0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving", map);

        jsonObject = JSON.parseObject(json);
        if (!jsonObject.getString("status").equals("0")) {
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject) jsonArray.get(0)).get("distance");

        if (distance > 5000) {
            //配送距离超过5000米
            throw new OrderBusinessException("超出配送范围");
        }
    }
}
